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TypeReferenceReaderDecorator.java
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TypeReferenceReaderDecorator.java
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/*
*
* Copyright (c) 2017 Otávio Santana and others
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Apache License v2.0 is available at http://www.opensource.org/licenses/apache2.0.php.
*
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
*
* Otavio Santana
*
*/
package org.jnosql.diana.api;
import java.util.ArrayList;
import java.util.List;
import java.util.ServiceLoader;
/**
* Decorators of all {@link TypeReferenceReader} supported by Diana
*
* @see ValueReader
*/
public final class TypeReferenceReaderDecorator implements TypeReferenceReader {
private static final TypeReferenceReaderDecorator INSTANCE = new TypeReferenceReaderDecorator();
private final List<TypeReferenceReader> readers = new ArrayList<>();
{
ServiceLoader.load(TypeReferenceReader.class).forEach(readers::add);
}
public static TypeReferenceReaderDecorator getInstance() {
return INSTANCE;
}
@Override
public <T> boolean isCompatible(TypeSupplier<T> type) {
return readers.stream().anyMatch(r -> r.isCompatible(type));
}
@Override
public <T> T convert(TypeSupplier<T> typeReference, Object value) {
TypeReferenceReader valueReader = readers.stream().filter(r -> r.isCompatible(typeReference)).findFirst().
orElseThrow(() -> new UnsupportedOperationException("The type " + typeReference + " is not supported yet"));
return valueReader.convert(typeReference, value);
}
@Override
public String toString() {
return "TypeReferenceReaderDecorator{" + "readers=" + readers +
'}';
}
}